Beekmantown Group

Beekmantown Group
Stratigraphic range: Lower Ordovician–Middle Ordovician[1]
Type Group
Overlies Potsdam Sandstone
Lithology
Primary Dolomitic sandstones and carbonates
Location
Region Eastern North America
Country United States, Canada

The Beekmantown Group is a late Cambrian to lower–middle Ordovician geologic group that occurs in the northeastern United States,[2] datable from its conodont fauna. It contains dolomitic sandstones and carbonates from just off land from the palaeocoastline.[1]

The usage of the term is diverse and depends on the state or region in question, and the group encompasses different formations in different regions. In some states it is considered a formation rather than a group, but the lithology varies by region.[3]

See also

References

  1. 1 2 Salad Hersi, Osman (2012). "Biostratigraphic Constraints on Chronostratigraphic Intraformational Relationships within the Lower–Middle Ordovician Beekmantown Group, Laurentian Margin: Eastern Ontario and Southwestern Quebec, Canada". AAPG Memoir. 98: 559–574. doi:10.1306/13331507M983506 (inactive 2018-09-10).
  2. ↑ Hersi, O. S.; Lavoie, D.; Nowlan, G. S. (2003). "Reappraisal of the Beekmantown Group sedimentology and stratigraphy, Montréal area, southwestern Quebec: Implications for understanding the depositional evolution of the Lower-Middle Ordovician Laurentian passive margin of eastern Canada". Canadian Journal of Earth Sciences. 40 (2): 149. Bibcode:2003CaJES..40..149H. doi:10.1139/e02-077.
  3. ↑ Beekmantown Geologic Unit, Geolex — Unit Summary, National Geologic Map Database. USGS/AASG. Retrieved 2018-06-11.


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